Answer:
8%
Step-by-step explanation:
30 × 1.1 = 33
20 × 1.05 = 21
→ Find new perimeter
(33 × 2) + (21 × 2) = 108
→ Find old perimeter
(30 × 2) + (20 × 2) = 100
→ Find percentage increase
[tex]\frac{108-100}{100} *100=8[/tex]
